A study of nonrandom mating in the polymorphic Adalia bipunctata populations of the Crimea

A study of nonrandom mating in the polymorphic Adalia bipunctata populations of the Crimea

Zakharov, I.A.; Goryacheva, I.I.

Genetika 34(8): 1090-1093

1998

The partners' phenotype-dependent formation of mating pairs was studied in two Adalia bipunctata populations inhabiting different Crimean localities: the town of Yalta, where the percentage of black animals was 60.1%; and the city of Sevastopol, where it was 25.0%. In the population of Yalta, an increase in the proportion of red (typica) individuals was observed among copulating females; in the population of Sevastopol, conversely, an increase in the proportion of black morphs was detected. Significant deviations from random mating for the beetles of different phenotypes were found in the population of Yalta, where mating between beetles of different phenotypes occurred more frequently than expected (the phenotype-negative preferential mating). Muggleton's index CPR characterizing the participation of red and black individuals in mating was 0.71 and 1.34 for the populations of Yalta and Sevastopol, respectively, which indicates a mating preference for beetles of a rarer phenotype.